摘要
研究了养殖密度和温度对白斑狗鱼稚鱼在设施养殖中生长的影响。经过30d的养殖试验发现养殖密度和温度对白斑狗鱼稚鱼在设施养殖中的摄食和生长都有显著影响。日增重、特定增长率、生长效率、摄食效率随密度的增大而减小,净增重24ind·m-3和16ind·m-3密度组最高;随着温度的升高,日增重、特定增长率、生长效率均呈现先升高后下降的趋势,其中24℃组生长最快,摄食效率则随温度的升高而增大。特定生长率与密度之间存在显著直线回归关系,其回归方程为SGR=7.30-0.122SD(r2=0.9927);养殖温度和特定增长率之间存在显著二次函数关系,其回归方程为SGR=-0.047T2+2.169T-19.56(r2=0.8342),当温度为23.1℃时,白斑狗鱼的特定增长率最大为5.544,表明白斑狗鱼最适生长水温应在23～24℃。白斑狗鱼尽管是凶猛性鱼类,但只要控制好一定的养殖密度和水温,进行设施养殖是可行的。
A study on the effect of stocking density and water temperature on the growth of juvenile white spot pike Esox lucius was conducted. During the expedraental period, water temperature, pH, dissolved oxygen （DO） and ammonia- N level were measured once a day respectively. The major environmental factors were controlled at the same levels in each experimental tank where DO was beyond 5.5 mg· L^-1. White spot pikes weighing （20 ±0.31 ） g（ mean ±SE） were reared in different stocking density（ 8, 16, 24, 32 and40 ind·m^- 3） and water temperatures（18 ℃,21 ℃,24 ℃,27 ℃ and CT）in greenhouse for 30 days. At the end of the experiment, fishes were weighed and data analyzed by ANOVA and correlation methods using SPSS software. Growth performance of the fish was significantly affected by water temperature and stocking density. Daily weight gain, specific growth rate, growth efficiency,ration were significantly decreased with increasing densities, maximum SGR（6.282 ±0.022） occurred in 8 ind·m^- 3. But for net yield, they were much higher in group 24 and 16 ind·m^- 3; With temperature increased, daily weight gain, specific growth rate, growth efficiency increased firstly and then decreased, and reached a maximum （ SGR = 5. 667 ± 0. 041 ） at 24 ℃. There was significant（ P 〈 0.01 ） negative correlation between density and SGR [ SGR = 7.30 - 0. 122SD, r^2 = 0. 9927 ], and there was significant correlation between temperature and SGR[SGR = -0. 047T^2 ＋ 2. 169T- 19.56, r^2 = 0. 8342]. Based on the regression equation, the fish achieved the biggest SGR （5. 396 % ） at 23.11 ℃. Compared with previous studies, the optimal water temperature is generally lower for white spot pike cultured in greenhouse, and it can be raised in greenhouse successfully if the water temperature and stocking density are well controlled. During the experiments living food were fed, but commercial food for white spot pike is still a problem to be solved.
出处
《水产学报》
CAS
CSCD
北大核心
2006年第1期76-80,共5页
Journal of Fisheries of China
基金
上海市科学技术委员会资助(43258016)
上海市科技兴农重点攻关项目(沪农科推字2004第1-5-5)
关键词
白斑狗鱼
稚鱼
养殖密度
温度
设施养殖
Esox lucius
juvenile
stocking density
water temperature
greenhouse
